/*$$
 * Copyright (c) 1999, Trustees of the University of Chicago
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with 
 * or without modification, are permitted provided that the following 
 * conditions are met:
 *
 *	 Redistributions of source code must retain the above copyright notice,
 *	 this list of conditions and the following disclaimer.
 *
 *	 Redistributions in binary form must reproduce the above copyright notice,
 *	 this list of conditions and the following disclaimer in the documentation
 *	 and/or other materials provided with the distribution.
 *
 * Neither the name of the University of Chicago nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE TRUSTEES OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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 *$$*/
package uchicago.src.sim.games;

public class PayoffMatrix {

  private float[] matrix;
  //private int rows, 
  private int cols;

  public PayoffMatrix(int rows, int cols) {
    this(rows, cols, 0);
  }

  public PayoffMatrix(int rows, int cols, int defaultValue) {
    matrix = new float[rows * cols * 2];
    //this.rows = rows;
    this.cols = cols;
    for (int i = 0; i < matrix.length; i++) {
      matrix[i] = 0;
    }
  }

  /**
   * Returns the payoff for row player.
   */
  public float getRowPayoff(int row, int col) {
    return matrix[(row * 2 * cols) + (col * 2)];
  }

  public float getColPayoff(int row, int col) {
    return matrix[(row * 2 * cols) + (col * 2) + 1];
  }

  public float getRowPayoff(GameChoice row, GameChoice col) {
    return getRowPayoff(row.val,  col.val);
  }

  public float getColPayoff(GameChoice row, GameChoice col) {
    return getColPayoff(row.val, col.val);
  }

  public void setPayoff(int row, int col, float rowVal, float colVal) {
    matrix[(row * 2 * cols) + (col * 2)] = rowVal;
    matrix[(row * 2 * cols) + (col * 2) + 1] = colVal;
  }
}
    
